In a Facebook post, Fritsch explained that he was taking a variety of supplements, including one that contained DHEA, which is on the banned list.

"I'm just so upset with myself that I didn't think to question what was in the supplements,'' he wrote. "But I never did. And in the program rules, it stipulates that a self-report is the same as a positive test. ... I just wish I had paid attention to the details. I'm embarrassed that I didn't pay attention to the details.''

He had started a weight-loss program that included the banned supplement. The tour accepted his explanation and issued the three-month suspension, although it did not announce it until Monday.

The Canadian is the fifth golfer suspended under the policy that went into effect in 2008. Last month Australia's Mark Hensby was suspended for a year for failing to take a test that was required.